Originally posted by m.massimo A question about power supply.
I browsed the net to find information on LM78xx regulator (I've a technical background, but not on electronics). I found many schemes like the one in this thread (and that I made for my shigaclone).
In these schemes, cap before regulator is usually around 1000/2000uF, but cap after LM is from 0.1uF to 0.47uF (not 1000 uF).
For our application, is it more important quality, capacitance value or both?
Thanks.

If you use very low cap value, the bass will be missing (in Shigaclone)

Quote:

Originally posted by m.massimo Another question.
I've a 80VA CT transformer in backorder from Digikey (the only items remained in back order). Now I'm using a 30VA CT. The transport works well. Do you suggest to maintain the 80VA back order and install it when it will be delivered (two months) or cancel it and stay with the 30VA? Thanks.

There is subtle difference between low power transformer and higher power, although I would say that in my system comparing 50VA vs 100VA was rather negligable.

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My plan is to bild the transport as it is done in this pdf file http://tim.cheapo.cc/images/CD%20player%20mods.pdf. But i did run it to a small issue today, i cant find any parts use, i want black gates but i cant find them in norway, and the didital output resistors are not easy to find here .. so if anyone here has black gates and some resistors that i can use i will be verry happy to buy them

Iam alitle unsure what to do whit the oscillator change it or use a clock, guess i will use the stock one in the begining ..

In some ways it is better that my prevous built, especially when it comes to raw energy in reproduced sound. The trade off is slightly less refinement and smoothness, but when you get used to it, you won't even notice

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“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

__________________www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

__________________www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC